Modeling and simulation of Vlf field strength prediction

The effect of Vlf communication is impacted by the environment factors, so the effect lacks the uniformity in the region of time ,space and frequency. It made use of the prediction of the vlf wave propagation, applied the waveguide mode theory to set up the math model and process the computer simulation, predicted the signal field strength of vlf, the prediction results accord with the measuring data. Then it implemented to display the spatial distribution of vlf signal field strength combined with the MapX, so as to we could display the cover range of the transmitter´s reliable communication. So we can implement the accurate prediction of the communication effect, and the efficiency of submarine communication could be enhanced.